Time-switch for x-ray and other machines.



H. F. WAITE.

TIME SWITCH FOR X-RAY AND OTHER MACHINES. APPLICATION FILED AUGZI, 191s.

1,250,729. Pamnted Dec. 18,1917.

3 2 SHEETS--SHEET L. V VVZQQ- 2 l A94 6 I". s 1 0 44 4a H. F. WAITE.

TIME SWHCH FOR X-RAY AND OTHER MACHINES. APPLICATION FILED AuG.2|. 1916.

1,250,729. Patented De0.18.1917.

ZSHEETS-SNEETZ.

/6 g, 26 20 /o //0 x0 aqm citizen of. the United 1 UNITED STATES PATENT O F QTE- HARRY I. WAITE, OF WHITESTONE LANDING, NEW YORK TIME-SWITCH FOB X-RAY AND OTHER MACHDIEQ.

. Specification of Letters mm. P t t d Dec, 1 9 1 Application filed Augiist 21, 1916. Serial No. 115,991.

To all whom it may concern:

Be' it known that I' HARRY F. Warm, a tates, and aresident of'Whitestone' Landing, county of Queens,

--city and State. of New York, have invented a new and useful Improvement in Time Switches for X--Ray and other Machines, of

which the followingis a specification. The'object of my invention is to provide a switch of this=class which may be so as togive a number of exposures, aggregating a predetermined amount and no more,

sothat the right exposure may always had with theapparatus where my switch is employed, and yet the apparatus may never be overtaxed, asit is much less hard.

upon the apparatus 'tohave'a number of short exposures instead of one long one. These,-and other, objects areaccom lishefd bymy invention, one embodiment 0 which hereinafter more particularly set forth.

For a} more particular description of my invention, reference isto b h d t th accompanying drawings, formi a" part? hereof, in Wlll0l1;-

Figure 1 is-a plan yiew ofl time switch.

Fig. 2 is an end elevation of the same.

Fig. 3 is a sectional view,'.taken:jon the line of Fig. 4, looking in thedirection Ofthe arroWsJ 'Fig. 4 is'a sectional Yiew, t'aken on the in the'dn'ection line 4-4 of Fig. 1, looking of the arrows.

Fig. .5is a sectional view, taken onthe' line 5 -5 of Fig. 4, looking in the direction of the arrows. I -y' Throughoutthe various views of the drawings, similar reference characters designate similar parts.

My'improved switch 1 consists of'a casing 2 on which is placed a base 3 of insulating material, asslate, and on this is mounted a switch 4, together with its connections, which cause it to be thrown in one direction by a 'fm)tpedal 5, and in another direction by a coil spring 6 which acts to open the circuit when a time-controlled mechanism 7 permits. The base 3 and the" Bedal 5 are connected at one end of each y a suitable pair of contacts 8 and 9 which are adapted to come together as shown in Fig. 4, so that the circuit is closed through two switches or contacts, one at the switch 4 and one between th parts 8 and 9, and

, a earriesj affsinall it may be opened at eitheror bothas ivill' appear below, soas to permita definite closing for a definite time, always subject to the foot control of the operator. j

The casing 2' consists of akbottom 10, an end 11 and sides v12, which-preferably terminateshortof the bottom, as shown.- The casing maybe made of any suitable'material,

as wood or'm'e'talyor anything else, as de The insfl lated is s ured to the casing b ble" screws 13, or'-- Qatlthe .four. corners;

n orward end of this base 14 secured by suit: this'pedestal carr esgthe,

contact-19, suitable Wirelfi connectsj-gth s pedestal which} is made of able screws infthe'jconventional manenga es second ja'w20,

"on" the base: 3, and

by a- Win21. Z-Ifrbmwhih runs a lead V igl, 3. Another lead '24 post 25:.which' is connected the 'nt act 8 ofthe foot ea mine- 'I- js,w' "8 prorided with a diagonally hich arm; '.is'-' connected 5 by means of liconnecting link 31, provided with'a nut32at'its free end, and the pedal 5 is provided with a downwardly (in-ejecting 100 stud 33.which is fixed thereto, an provided with a perforation at oneend which-passes over the link 31, and with another perforation which is scre w threaded to receive the setscrew 34, which is connected at times with 05 the timecontrolled mechanism 7 as will agpear below. From the foregoing it is-o Tious that the projection 33 can pull the link 31 butcannot shove the same, this pull being exerted through the adjustable nut 32,110 i eansg -and -'these., screws 'eymrwiird w 17 rials 15' itch-thus a suitable blade Q foot-pedal is pivotally mounted on u suitable pivot 35 which as in turn pivotallymomited near BiiCl'l end in suitable brackets 36 which use from the base- 3, and a coil spring 37 has one end against the lower surface of the foot'pedal. and another end against one of the brackets 36, and this coil spring is mounted about the shaft 35, and is so arran ed and .disposed that itnormally keeps the Y ootspedul 5 in its elevated position, so that the contacts u and 9 are normully separated. The contact 8 isunounted on a suitable pedestal 38, which is secured b screws 39 to insulating nmterial 40, whici is secured to the lower surfzice and outer-end of the foot-pedal 5.

The time-controlled mechanism 7 is suspended from a plate 41 which is secured to the casing 2 by means of a suitable screw 42 and t0 the base 3 by means ofscrews 43 which pass through suitable insulating washers 44. It is apparent from Fig. 1 that the plate 41 has a slot 45 through which fprotrudes a pin 46 whichriscs upwardly rom the catch 29 and extends well above the upper Surface of the plate 41. The catch 29 is pivoted, as shown in Fig. 3, at 47 on any suitable pivot, and is norlnally held. against a stop 48 by means of a coil spring 49 con nectingthis catch 29 with a pin 50, in the conventional manner. The pin 50 rises from the base 3. As ion as the. catch 29 is in the position shown in fig. 3, that is against the stop 48 it will engage the part 28 of the projection 27 of the blade 18, and these parts 28 and 29 will be held together as long as the spring 50 can perform this function; It cannot perform this function when the catch 29 i thrown out of the path of the projection 27, or when this projection is drawn by the link 31 away from the catch 29 as occurs when the spring 37 raises the footpednl 5, as the spring 37 is much stronger than the spring 6. The time controlled mechanism for throwing the catch 29 clear of the projection 27-, at it predetermined time, will now be described in detail.

The time controlled mechanism. 7, in addition to the catch *2!) and the parts connected therewith, which have been described above,

has two parallel plates, an upper 51 and a lower 52, connected by the usual studs 53 which hold these plates in parallel. relation at all times to receive the cal clock-micellenism which will be dose bed :nordilidctail. This clock mechanism has a. main arbor on which is mounted, a coil spring 54, in the usuzal manner. with its inner end secure-1 thereto, and its outer end secured to a stud 56 which projects: from the upper plate The spring 55 is under tension at tension of, this spring against the pin 46 to throw the catch 29'clear of the projection 27. The time controlled mechanism 7 is so arranged and disposed that for a given time, say one second, t 1e arm 57 travels a certain distance, which is indicated by numerals on the plate 41, as shown in Fig. 1. This main arbor54 carries a. ratchet 58 which is fixed thereto in the usual way and adapted to engagea pawl 59, mounted on a gear 60, as is usual in such structures, and this gear meshes witha clock train 61 of the conventional kind, which is rovided with an escapement wheel 62 w ich meshes with an escapement 63 to which is secured a. pendulum bar 64 which is oscillated and driven by..85

the escapement wheel 62. This escapement wheel 62 also forms a part of thepmechanism for prevent-in the clock-work from.operat-' ing, as it has ad: of the pawl 63a suitable pivoted dctent 65 which is held by spring pressure exerted through a suitable coil spring 66about a stud 53 so that the escapement wheel'62 cannot drive the escape ment dog or ratchet 63, unless the tension of this sprln 66 is overcome. This tension is overcome by means of a bent shank 67 fixed to the detent 65 which extends into the path of the set screw 34 so that whenthis set screw 34 is projected'against the shank 67 the tension of the spring 66 is overcome and crate in the conventional manner.

Operation.

In view ofthe foregoing, the operation of my improved device will be readily understood. Assuming that the leads 23 and 24 run to any suitable device, as an X-rcy apparatus, where it is desirable to give a time and intennit-tent or just a time action, the arm 57 is turned on the main arbor 54 and turns this arbor with it to the extent desired, say enough for four seconds, that is beyond the point indicated by the numeral 'lon the plate 41. Thereafter the operator depresses the foot-pedal 5 by lacing his foot, thereon. As soon as he oes so the parts being connected as above indicated, all

tension is taken oflf' the link 31 and the set .away' from the shank 67 and the clock mechanism is stopped, and at the same time ten- 51011 is put through the nut on the rod 31 so as to keep theswitch-hlade of the switch 4- closed in the contacts 17 and 20. When the foot-pedal is again deprcssed the clock mechanism again starts and again throws the arm 57 toward the left, that is anticlockwise. \Vhen the pedal 5 is lowered a contact is madebc-tween the parts 8 and 9 and the circuit is complete. When the footpedal is raised under the tension of the spring 37 this circuit is opened. This opening and closing is continued as often as desired b the operator until the'arm 57 reaches the pm 46, at which time the catch 2!) gets clear ofthe )rojcction 27 on the blade 18, and then' the, spring 6 acts to open the circuit between the blade 18 and the contacts 17 and 20, and thereafter it. is impossible to close the circuit. through the switch until the arm 57 is again set, after which the above mentioned operations may be repeated, and this cycle of perat ons may be repeated as often as desired.

From the foregoing it is apparent that my improved switch is not restricted to the pn cisc embodiment herein shown and described, but is broad enough to cover all structures which come within the scope of the annexed claims.

Having thus de cribed my invention, what 1 claim is: c

, 1. In a device of the class described, time controlled means for opening a circuit, a foot pedal with means for opening a. circuit and connections between the two so that acircuit may he opcned'as often as desired by the operator, and closed for a time aggre; "atin; what the apparatus has been set for. said connections being arranged so that the time controlled means for opening the circuit cannot operate except, when the foot pedal means is closed.

2. ]n a. device of the class described, a switch and lime controlled means for opening he same, a foot. pedal with a second switchnnd connections between the footpcdal and the time cont rolled switch so that no cir- (:Hit is closed unless both switches are closed, and the time controlled switch may he opened only when the footvcontrolled switch is closed, and the time controlled mechanism cannot, operate unless the foot controlled switch is closed.

.3. In a. device of the class described, a base, two switches supported thereby, a clock mechanism supported by said ba'se. a connect-ion between one of said swi ches and the said clock mechanism where]; file clock mechanism permits the opening 0 one ofthe said switches, a foot pedal mechanism for closing, the other ofsaid switches, and connections between the foot pedal and the time controlled switch sodhat it an be open d only when the foot pedal switch is closed.

4. In a derive of the class described, a base, a contact on said base, cars rising-from said base and a, foot'pedal pivot-ally con .ncctcd to said cars, a contact carried by'said as pedal and adapted to engage the contact on said bas t close the circuit, a projection extending from said foot-pedal, a spring for normally keeping said foot-pedal in its raised position, a pivoted switch and connections between said pivotedswitch and said projection whereby said pivoted switch may be clo ed y said projection when the to l-pcdal is .l'nlsltl. a spring for opening pivoted switch, a eatchconucctcd tosaid pivotcd -swilcll and adapted to keep the same from opening unless swung clear of said pivotcd switch, a time controlled mechanism, a connection between said time controlledmechanism and said, project ion whereby the projection may. release the time edntrolled nu-chanism and put. it in operation, means for determining time the pivoted switch can remain closed, and suitable wiring conneclions so that the circuit may be opened either by the foot-pedal or by the pivoted switch when the time controlled mechanism permits.

mam WAITE. 

